21001903

素因数分解:

${\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{929}}^1$

素因数の和:1026

約数の個数: 16

約数和(自身を含む): 23748480

約数和(自身を除く): 2746577

約数列:

[1, 13, 37, 47, 481, 611, 929, 1739, 12077, 22607, 34373, 43663, 446849, 567619, 1615531, 21001903]

約数ペア:

[(1, 21001903), (13, 1615531), (37, 567619), (47, 446849), (481, 43663), (611, 34373), (929, 22607), (1739, 12077)]